Can't get Renoise to act as Rewire slave for Reaper

Like the title says. I have an open Reaper project (master) and after I launch Renoise I don't get the option window to select Renoise as rewire slave. (as described here http://tutorials.ren...om/wiki/ReWire)

I've tried shutting down both programs and launch from scratch again but it doesn't help. Renoise doesn't ask me to act as rewire slave and Reaper doesn't recognize Renoise as a rewire application.

A few things that may or may not apply (from my experience on Windows):

Both Reaper and Renoise have to be the same bit-version (32 or 64)

You have to make sure rewire gets installed when installing reaper. For some reason it was not checked by default when I installed Reaper a while ago, but now it seems to be always selected in the optional features when I get updates (perhaps because I've now installed it)